Question

I have lots(+2000) of GUIDs(in some network class) and my program must find one of them when it receives a message and do the job associated with it.
the positive point is i have a hard-code generator, but the fastest way is my goal(and i don’t know how to implement it).

my code should do something like this:

switch(received guid)  
{  
case guid1: do job 1; break;  
case guid2: do job 2; break;  
case guid3: do job 3; break;  
case guid4: do job 4; break;  
....  
}  

Answer 1

Create an interface for doing the Job, then implement 2000 classes which do the work, each of which knows its own guid. Then add the classes to a dictionary using its guid as the key. Then when you get the guid, you look the object up in the dictionary and call the method on the interface.

public interface IJobDoer
{
    void DoJob();
    Guid Guid{get;}
}

public class FirstJobType : IJobDoer
{
    void DoJob()
    {
     /// whatever...
    }
    Guid Guid { get{return "insert-guid-here";}}
}